Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 419

PIPER CHEROKEE WARRIOR SERV I C E M A N U A L
d. It is recommended that vent caps be left on the battery while charging. In addition a wet cloth
should be placed over the vent caps within the manifold.
e. The battery may be charged at any rate, in amperes, not to exceed that point which would produce
bubbling and gassing of the electrolyte or a cell temperature of 115° F in any case.
If a cell temperature reaches the 115° F. limit, the charging
rate shall be reduced and the charge completed at 3 amperes
or less. DO NOT CHARGE AT A HIGHER RATE WHEN
CELLS ARE GASSING. Refer to Gill Service Manual
G.S.M.-682 for alternate charging methods and service proce -
dures.
f. If a constant current (recommended) charge is available, the charge should be started at 3 amperes
and reduced in half if and when cells start gassing until fully charged.
g. As charging occurs, if any cells sputter or flood, the electrolyte level is too high and the excess
must be removed. In any case the electrolyte level shall be adjusted at the end of the charge. The level will
rise due to acid returning to the electrolyte mix, normal gassing, and expansion due to temperature rise.
h. Thoroughly clean battery after charging to prevent remaining acid bridges which can form during
charging.
Never allow lead acid batteries or tools used on them to be
near Ni-Cad batteries and Ni-Cad battery tools.
11-54. HYDROMETER READING AND BATTERY CHARGE. (WARRIOR III)
Whenever checking the battery, ascertain that all connections are clean and tight and that the fluid
level is above the baffle plates. If it is necessary to add fluid, fill cell with distilled water to the bottom of the
split ring. After adding water, charge the battery until gassing before taking a hydrometer reading. Otherwise,
the water and electrolyte will not be mixed, giving a false reading. Temperatures different from the established
norm will effect the hydrometer readings. Refer to Chart 3 for the temperature corrections. Specific gravity
values for a fully charged battery are as follows:
To adjust low specific gravity, charge the battery (see Charging Battery) until it is gassing and until the
specific gravity rises no higher over a 3-hour period. Then remove some electrolyte and replace with 1.300
specific gravity electrolyte. Repeat this step if, after one hour of charging, the specific gravity is still too low.
DO NOT ADJUST A CELL THAT DOES NOT GAS.
To adjust high specific gravity, charge the battery (see Charging Battery) until it is gassing and until
the specific gravity rises no higher over a 3-hour period. Remove some electrolyte and replace with distilled
water. Repeat this step if, after one hour of charging, the specific gravity is still too high.
In the operation of the battery, gases are formed which may be
explosive if ignited. Never create sparks of any kind or bring
an open flame near the battery. Ventilate the battery when
charging to dispose of the gas generated by the battery.
Added: February 28, 1995
NOTE
NOTE
CAUTION
2F12
Island Enterprises
ELECTRICAL SYSTEM